Board Thread:General Discussion/@comment-31398341-20170409101440/@comment-27535813-20170807045709

Xatu can perform many roles such as being an anti-hazard lead, can provide utility/support with its wide movepool, and also offensive.

You should only consider Xatu depending on what your team needs. If you wish to be unpredictable then making up sets on your own IS a requirement. It is pointless to be asking for advice when there is smogon for sample sets too. And for whatever your thinking, smogon doesn't make sets "under specific circumstances", if anything sets are made to be "flexible" to fit a specific type of team, not to counter a specific Pokemon.

Although Xatu is outclassed by Espeon, Mega Diancie and Mega Absol as an offensive magic bounce Pokemon, if you already have a Mega Pokemon or/and you need the movepool Xatu has(i.e. role compressor), then by all means Xatu can work efficiently in that sense.